The air permeability (k_a) of three remolded loess samples was measured by a transient vacuum attenuation air permeability meter in an indoor environment, and the influence of the initial dry density, initial water content, air-filled porosity, and drying-wetting path on soil k_a was analyzed to clarify the relationship among the dry density (ρ_d), water content (w), air-filled porosity (η_a), and wetting or drying path of the remolded loess and the k_a. The results showed that the density and moisture of the remolded loess had an obvious effect on the k_a, which was controlled by macropores and the water/air saturation of soil. The ρ_d = 1.60 g/cm³ may be a watershed. When ρ_d > 1.60 g/cm³, the k_a decreased with an increase in the molding w. When ρ_d ≤ 1.60 g/cm³, the change in k_a was minimal for specimens that were compacted on the dry side of the optimal water content (w_op), the maximum k_a was near the w_op, and the k_a decreased rapidly when it was compacted on the wet side of the w_op. In the process of wetting or drying, the k_a decreased with an increase in saturation, but the k_a during the drying path was higher than that of the wetting path at the same or similar saturation due to the effect of dry shrinkage. For the condition in which other factors were consistent, there was a significant exponential function relationship between the k_a and the η_a for the step wetting specimen, and the parameters of the exponential function were closely related to the porosity. In addition, the k_a and k_s had a satisfactory power function relationship, and a quadratic polynomial function relationship between the power function parameter and the ρ_d parameter was observed.

_{采用瞬态真空衰减式透气度计在室内环境中测量了三个黄土样品的}透气率（ka），以及初始干密度、初始含水量、充气孔隙率和干湿路径的影响。对土壤上的ka_进行分析，阐明了改造黄土的干密度（_{ρd ）}、含水量（w）、充气孔隙度（ηa ）、干湿路径与ka之间_的关系。结果表明，改造后黄土的密度和水分对k _{a有明显影响。}，这是由大孔隙和土壤的水/空气饱和度控制的。ρ _d  = 1.60 g/cm ³可能是一个分水岭。当ρ _d  > 1.60 g/cm ³时，k _a随着成型量w的增加而减小。当ρ _d  ≤ 1.60 g/cm ³时，在最佳含水量 ( w _{op ) 的干侧压实的试件}k _a的变化最小，最大k _a在w _op附近，而k _a当它在w _op的潮湿侧被压实时迅速下降。在润湿或干燥过程中, k _a随着饱和度的增加而减小, 但由于干缩的影响, 在相同或相似饱和度下, 干燥路径中的k _a高于润湿路径。在其他因素一致的情况下，阶梯润湿试样的k _a和η _a之间存在显着的指数函数关系，并且指数函数的参数与孔隙率密切相关。此外，k _a和k _s具有令人满意的幂函数关系，并且观察到幂函数参数与ρd参数_之间的二次多项式函数关系。